Telephone-repeater.



N0. 798,720. PATENTED SEPT. 5, 1905.

' D. H. WILSON.

TELEPHONE REPEATER. APPLICATION FILED PEB.14, 190s. RENEWED FEB. 11.1905.

Javenor.

Jazz/ a 55 0 DAVII) H. WILSON, OF IIIHAOO, ILLINOIS, ASSIONOR TO (1 ICOROIC \V.

IQItICIZINGIGIt, Ol ("IIIUAHO, ILLINOIS.

TELEPHONE-REPEATER.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed February 14:, 1903. Renewed February 11, 1905. Serial No. 245,229.

To ft Who/it it 'IILII/II/ concern:

Be itlcnown that 1, DAVID H. \VILsoN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Telephone-Repeaters, of which the following is a specification.

My invention relates to telephone-repeaters, and has for its object to provide a new and improved device of this construction.

My invention is illustrated in the accompanying drawings, wherein Figure 1 is a diagrammatic view of one construction embodying my invention. Fig. 2 is a diagrammatic view showing a modilied construction.

Like letters refer to like parts throughout both ligures.

Referring to the device of Fig. 1, I, have shown two sets of instruments A and B, comprising the Ol'tllllttl') transmitter and receiver, one at each end of the line. The repeater is located at some suitable point or points along the line. As illustrated in Fig. 1, this intermediate device consists of a core 0, upon which is wound a coil A, connected in circuit with the instruments at station A. Upon this core is also wound a coil B, connected in circuit with the instruments at station 1B. The coils A and B are entirely separate. Associated with the core C are the telephone receivers D and E, one at each end thereof, the core acting as the controlling-magnct for the receiverdiaphragm. Opposite the receiver D is a transmitter F, and opposite the receiver E is a transmitter G, the transmitters being so arranged as to receive the soundwaves produced by the receivers. These transmitters are connected in circuit through a divided primary coil, consisting of the two sections H and H, wound upon the core C, the battery or other source of electric supply I being connected in the circuit, preferably between the two sections of the coil. By means of this construction the messages may be transmitted in both directions over the same line and without any additional wires or devices for this purpose. If, for example, the instruments at station A are being used, the current generated passes through the coil A. This energizes the core C and operates the receivcr D.

This receiver D then acts upon the l transmitter F, thus causing the current to 5 pass through the sections H and H of the coil in circuit therewith. A current is then induced in the coil B and passes out to the instruments of stat-ion B. The receiver E works simultaneimsly with the receiver D, and I therefore have the action of both transmitters in connection with the coils H and H. If the instruments of station B are being used, a current is set up in the coil B. This acts through the core (I to actuate the two receivers. These receivers act upon the transmitters, and a current is produced in the coils H and H which induces a current in the coil A, said current passing out to the instruments of station A, so as to reproduce the sound at that point.

1 have shown only one repeating device in circuit; but it is of course evident that a series of these devicesmay be used. It will be seen that by means of this device a message may be transmitted in either direction along the same line, and such message will be reinforced by tho repcatil'ig device.

In Fig. 2 I have shown a modilied construction wherein the coils A and B are connected in the same circuit connecting the stations A and B.

.I have described in detail a particular construction embodying my invention and .I have illustrated the parts diagrammatically. It is of course evident, however, that the parts may be varied in form, construction, and arrangement, and I therefore do not limit myself to the particular construction shown.

The species shown in Fig. 2 is not claimed in this application, but is claimed in a divisional application divided from this case and filed August 13, 1903, Serial No. 169,330.

I claim 1. A telcphone-repeater, comprising a core having two coils thereon, a receiver associated with said core. a transmitter associated with said receiver, a coil on said core in circuit with said transmitter, and a source of electric supply in circuit with the coil.

2. A telephone-rtmeatcr, comprising a core having two coils thereon, a receiver associated with said core, a transmitter associated with said receiver, a divided coil on said core in circuit with said transmitter, and a source of electric supply in circuit with the coil.

A telephone-repcater, comprising a core having two coils thereon, each connected with an electric circuit, a receiver associated with each end of said core, a transn'iitter associated with each of said receivers, a coil onsaid core connected in circuit with both transmitters, and a source of electric supply in the transmitter-circuit.

4:. The combination with two telephonesta tions of two separated coils intermediate or between said stations, and wound upon a common core, a connection between each of said coils and one of said stations, a receiver having its diaphragm actuated by said core, a transmitter associated with said receiver, a coil on said core in circuit with said transmitter, and a source of electric supply in the transmitter-circuit.

5. The combination with a circuit between two telephone-stations of two separated coils located between said stations and wound upon a common core, two telephone-receivers associated with said core so that their diaphragms are actuated thereby, a telephone-transmitter opposed to each receiver so as to be actuated thereby, a divided coil wound upon said core and connected in circuit with said receivers, and a source of electric supply in the receivercircuit.

6. The combination with a circuit between two telephone-stations of two coils, a receiver associated with each coil, a transmitter associated with each receiver, a primary coil in circuit with said transmitters and divided into sections, one section being associated with each coil in the telephone-circuit between the stations, and a source of electric supply in circuit with said transmitters.

7. The combination with two telephone instruments of a repeating" device provided with two coils wound upon a common core and having no electrical connection with each other, one coil being connected with one telephone instrument, and the other coil connected with the other telephone instrument, a third coil wound upon said core, a source of electric supply in circuit with said coil, a diaphragm associated with said core, a second diaphragm opposite thereto and actuated therefrom, said second diaphragm connected in circuit with said third coil.

DAVID H. WILSON.

Witnesses:

FANNY B. FAY, HOMER L. KRAFT. 

